.exercise_main_header{
    overflow: scroll;
    padding: 0px 10px;
      h2{
        color: rgba(16, 16, 16, 100);
      }
    //这是头部最新课程区域的开始
   
    .new_couese a {
        overflow: hidden;
        display: block;
        width: 100%;
       height: 100%;
       border-radius: 15px;
    
        width: 100%;
        box-shadow: 0px 0px 8px 0px rgba(0, 0, 0, 0.4);
      img{
          width: 100%;
        height: 150px;
        border-top-left-radius: 15px;
        border-top-right-radius: 15px;
      }
      div{
          width: 355px;
        
          padding-left:10px ;
         .p1font{
            color: rgba(16, 16, 16, 100);
            font-size: 16px;
          }
          .p2font{
            color: rgba(154, 154, 154, 100);
            font-size: 12px;
            margin-bottom: 5px;
          } 
      }
    }
    // 这是下面的课程区域的开始
    .courses{
        margin-top: 20px;
      h2{
        color: rgba(16, 16, 16, 100);
        font-size: 18px;
        margin-bottom: 10px;
      }
      .courses_a{
          display: block;
          width: 100%;
          border-radius: 15px;
          height: 150px;
          position: relative;
          overflow: hidden;
          margin-top: 20px;
          img{
              width: 100%;
              height: 100%;
              border-radius: 15px;
          }
          div{
              position: absolute;
              top: 62px;
              left: 10px;
              width: 355px;
           
              .course_span1{
                color: rgba(16, 16, 16, 100);
                font-size: 20px;
                color: #f2f5f8;
              }
              .course_span2{
                color: rgba(16, 16, 16, 100);
                font-size: 14px;
                margin-top: 10px;
                color: rgb(234, 236, 238);
              }
          }
      }
    }
}

.headerdiv{
    a.active2{
        color: #4294FF ;
    }
}
